A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

This replica of the Greek structure is in the heart of Nashville.

More than five miles of underground passageways.

This structure among the trees was the result of divine inspiration.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

Dinosaurs invade a suburban Nashville neighborhood.

The "Jade Museum" is full of thousands of intricately carved works of art made from various precious stones.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Mass graves and Victorian monuments mark the history of Memphis in this 19th century cemetery.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

This historic train station has been converted to a locomotive themed hotel.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

Live long and prosper in Tennessee.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Mile-long cave system near Great Smoky Mountains.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.